<template>
  <el-container class="home-container">
    <!-- 头部区域 -->
  <el-header>
    <div>
      <img src="../assets/logo.png" alt="">
      <span>电商后台管理系统</span>
    </div>
    <el-button type="info" @click="logout">退出</el-button>
  </el-header>
  <!-- 页面主体区域 -->
  <el-container>
    <!-- 侧边栏 -->
    <el-aside :width="isCollapse?'64px':'200px'">
      <div class="toggle-button" @click="toggleCollapse">|||</div>
      <!-- 侧边栏菜单区域 -->
      <el-menu background-color="#333744" text-color="#fff" active-text-color="#409EFF" unique-opened :collapse="isCollapse"
      :collapse-transition="false" router :default-active="activePath">
        <!-- 一级菜单 -->
      <el-submenu :index="item.id+''" v-for="item in menuList" :key="item.id">
        <!-- 一级菜单模板区域 -->
        <template slot="title">
          <!-- 一级菜单图标 -->
          <i :class="iconsObj[item.id]"></i>
          <!-- 一级菜单文本 -->
          <span>{{item.authName}}</span>
        </template>
        <!-- 二级菜单 -->
         <el-menu-item :index="'/'+subItem.path" v-for="subItem in item.children" :key="subItem.id" @click="saveNavState('/'+subItem.path)">
           <!-- 二级菜单模板区域 -->
        <template slot="title">
          <!-- 二级菜单图标 -->
          <i class="el-icon-menu"></i>
          <!-- 二级菜单文本 -->
          <span>{{subItem.authName}}</span>
        </template>
         </el-menu-item>
      </el-submenu>
      </el-menu>
    </el-aside>
    <!-- 页面右侧内容主体区域 -->
    <el-main>
      <router-view></router-view>
    </el-main>
  </el-container>
</el-container>
</template>

<script>
export default {
  name: 'Home',
  created () {
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  data () {
    return {
      // 左侧菜单区域
      menuList: [],
      // 字体图标
      iconsObj: {
        125: 'iconfont icon-user',
        103: 'iconfont icon-tijikongjian',
        101: 'iconfont icon-shangpin',
        102: 'iconfont icon-danju',
        145: 'iconfont icon-baobiao'
      },
      isCollapse: false,
      activePath: ''
    }
  },
  components: {},
  mounted () {},
  methods: {
    logout () {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    // 获取左侧菜单
    async getMenuList () {
      const { data: res } = await this.$http.get('/menus')
      // console.log(res)
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
      this.menuList = res.data
    },
    // 点击菜单，实现菜单的折叠与展开
    toggleCollapse () {
      this.isCollapse = !this.isCollapse
    },
    // 保存用户点击的侧边栏路径
    saveNavState (activePath) {
      window.sessionStorage.setItem('activePath', activePath)
      this.activePath = activePath
    }
  }
}
</script>

<style scoped>
.home-container{
  height: 100%;
}
.el-header{
  background-color: #373D41;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0;
  color: #ffffff;
  font-size: 20px;
}
.el-header div{
  display: flex;
  align-items: center;
}
.el-header div img{
  height: 40px;
  margin-right: 10px;
}
.el-aside{
  background-color: #333744;
}
.toggle-button{
    background-color: #4A5064;
    font-size: 10px;
    color: #ffffff;
    text-align: center;
    line-height: 24px;
    letter-spacing: 0.2em;
    cursor: pointer;
}
.el-main{
  background-color: #EAEDF1;
}
.iconfont{
  margin-right: 10px;
}
.el-menu{
  border-right: none;
}
</style>
